Fault Codes / Airwell / P7

AI

Airwell P7

High

YHD — Incorrect phase sequence / phase loss.

Airwell P7: Incorrect phase sequence / phase loss. This fault noticeably affects operation.

Possible causes

Phases swapped / missing.

Check steps

Check 3 phases; swap 2 if needed.

Affected parts

Phasenwächter
Sicherungen
Klemmenblock

Safety note

400V — isolate power.

Source: Airwell YHD/HZ Service Manual

Reviewed by Anıl Güzeldemir — in the refrigeration machine room since 2006, developer of Enthalio.

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